Page 06 9. During unexpected periods of drought the South American lungfish, Lepidosiren paradoxa, survives by burying into mud. This type of behaviour is known as A predictive dormancy B daily torpor C aestivation D hibernation. 10. An experiment was set up to investigate the effect of different respiratory substrates on the rate of respiration in yeast. Methylene blue can be used to measure the rate of respiration as it changes from dark blue to colourless when it accepts hydrogen ions. Four test tubes were set up, each containing yeast, methylene blue and one of the respiratory substrates. The table below shows the results of this investigation. Test tube number Respiratory substrate Appearance of the methylene blue after 20 minutes 1 starch dark blue 2 sucrose light blue 3 lactose dark blue 4 glucose colourless Which of the following conclusions is correct? The rate of respiration is A higher with starch than with glucose B lower with sucrose than with lactose C higher with glucose than with lactose D lower with glucose than with sucrose. 11. Stages of aerobic respiration are shown below. 1 Glycolysis 2 Citric acid cycle 3 Electron transfer chain Which stage(s) involve(s) both phosphorylation of intermediates and generation of ATP? A 1 only B 3 only C 1 and 2 only D 1 and 3 only